Shadow-projecting apparatus



Man 5, 1929.

A. R. MEISSNER SHADOW PROJECTING APPARATUS Filed Oct. 30, 1926 5 Sheets-Sheet 1 Fig. /9.

Mar. 5, 1929. A. R. MEISSNER SHADOW PROJECTING APPARATUS Filed Oct. 30, 1926 5 Sheets-Sheet y no Q Mar. 5, 1929. A. R. MEISSNER SHADOW PROJECTING APPARATUS Filed Oct. 30, 1926 5 Sheets-Sheet A 4 v//v f7. ME/SSNER.

Mar. 5, 1929. A. R. MEISSNER SHADOW PROJECTING APPARATUS 5 Sheets-Sheet 4 Filed Oct. 50. 1926 ALVIN R ME/ss/vER.

Patented Mar. 5, 1929. 1,703,945

UNITED STATES PATENT OFFICE.

ALVIN R. MEISSNER, OI WASI HINGTON, DISTRICT OF COLUMBIA, ASSIGNOR 01' ONE- HALF TO H. H. BYRNE, OF WASHINGTON, DISTRICT OF COLUMBIA.

SHADOW-PROJECTII IG APPARATUS.

Application filed October 30, 1928; Serial No. 145,278.

The present invention relates to an ap- Figure 8, a rear elevation of the supportparatus for projecting movable shadows as 1n plate for the minute hand crystal; well as stationary ones on a screen and con- Figure 9, a top plan view of Figure 8;

sists in the combinations and arrangements Figure 10, a vertical section along line of elements hereinafter described and parl.010 of Figure 8;

ticularly set forth in the accompanying Figure 11, a slide plate for adjusting the claims. minute crystal;

The main object of this invention is to Figure 12, a top plan view of Figure 11; provide a transparent clock dial having Figure 13, a front elevation of the minute 10 marked thereon the hours represented biz hand crystal and its supporting pinion ring; 60 numerals or letters or both together wit Figure 14, a rear elevation artly in secsuitable advertising matter or artistic ornation of a frame for the clock dial; mcntation all in semi-transparent colors or Figure 15, a side elevation of Figure 14; dark characters; and on separate crystals or Figure 16, a rear elevation of the trans- 1 other transparent plates for the hour and parent clock dial; 5 minute hands similarly marked and mounted Figure 17, a side elevation of Figure 16; to revolve in frontof a strong light in order Figure 18, a fragmentary elevation of a that the shadows of the hands and charclock dial with different advertising matter; acters may be projected on a screen, an Fi ure 19, a fragmentary front elevation 20 opaque window, a wall, or the street paveof t e heat distributing plate; 70 t, Figure 20, a vertical section of Figure A further object is to connect the revo- 19; and lublc crystals with atime piece either me- Figures 21, 22, 23 and 24 show rear elevachanical or electric and in such a manner tions partly in section, of ornamented trans- 25 that the hands may run clockwise or antiparent dials illustrating a few examples of 75 clockwise. v artistic representation of merchandise, art Still another object of the invention is to pictures, photographs, poster sketches and )rovide relative adjustment between the the like. hand crystals and the clock dial as well as In the drawings, reference numeral 30 the time piece and the light rays. (Figures 1 and 2) denotes the stand for the so This invention is a further improvement shadow clock. The stand as here illustrated on the shadow projecting apparatus consists of a base or foot 31, hind legs 32, shown and described in Patent No.1,579,880. front legs 33, and a frame 34. The latter In the accompanying drawings one emcomprises two parallel bars or rails to bodiment of the invention is shown, and: which the hind legs 32 are rigidly secured 85 Figure 1 is a side elevation partly in secbut the front legs hinged as at 36 under a tion of the shadow projecting apparatus as table 47 which is adapted to slide on the assembled; rails 35. p "Figure 2 a horizontal section along line In the following, front indicates the 2-2 of Figure 1; left of Figure 1,and rear the right there- 90 Figure 3 is a rear elevation of a frame 0 forming a detachable unit with the main op- The front legs may be set at any suitable erating elements of the apparatus; angle by means of a screw 37 and are 38. Figure 4 is a vertical section along line Since the hind legs have hinged connection 4-4 of Figure 3; as at 39 with the base 31 it is evident that 06 Figure 5, a fragmentary horizontal secadjustment in a vertical plane of the frame tion along line 55 of Figure 3; is possible.

Figure 6, a rear elevation of the mount- At the rear end of the frame 34 is rigidly ing for the clock reversing gears; secured a casing 40 with a removable top Figure 7, atop plan view of Figure 6; cover or lid 54 providing a chamber for the and complete removal of the frame.

light bulb 41 and the condensers 42. Behind the bulb is situated a reflector 43 throwing the bulk of the light rays forward through the condensers and the opening 44 in the casing. The bulb is mounted in a socket 45 on an adjustable slide 46 in the bottom of the casing 40 and numeral 48 denotes the conductor wires for the light bulb. The stand and'casing, forming no part of the present invention, have been shown as an example of mounting the device.

On the table 47 is secured. the telescopic mountin 49 for the lenses 50 in the focal axis of the condensers 42. The tube 51 carrying the lenses is axially adjustable in the outer or rear tube and the tubes may for this reason be provided with interengaging helical lands and grooves 53.

Between the casing 40 and the telescopic mounting 49 is located the carrier 55 for the clock work 56 and th main shadow producing elements; that is to say, the time indicating and advertising matter. The carrier is slidably mounted on the rails 35 and is reversible thereon in such a manner that either the front or rear side may face the condensers 42. To secure the carrier on the rails in adjusted position, set screws 57 are provided.

Instead of the hour and minute hands being mounted directly on the spindles 54 of the clock work, which may be of any suitable kind, these spindles carr each a gear wheel of which 58 denotes the 10111 gear and 59 the minute gear. In guides on the front side of the carrier 55 is mounted a hollow cone 60 which is intended to exclude the outer light from the lam ra s and does for. this reason fit with its orward end around the rear end of the telescopic mountin 49.

n suitable mortices or grooves in the sides of the carriage 55, tenons on the main frame 66 fit to permit vertical adjustm lelrlit e frame has an adjustment screw 67 adapted to rest with; its lower end on top of the carrier 55. By turning the screw it is'then possible to raise or lower the frame, with" relation to the carrier. A spring latch 68 fixed on the carrier engages a notch 69 in the screw and locks the frame and the carrier in adjusted position.

The frame 66 is provided with side ribs 70 each with a pair of vertically running grooves 71 and 72, the use of which will be described later. On the rear side of the frame 66 are found three or more rollers 73 symmetrically arranged around the center of the circular opening 74 in the framev 66, one rollerabove and the others below the center line and preferably spaced 120 degrees apart. These rollers serve as guides and supports for a grooved ring pinion 75,

volvably mounted in a lug 82 at the top of the frame. The threaded end of the screw en ages the threaded ear 83 on the parallel ars 84, so that by turning the screw, the slide 79 can be made to travel transversely on the frame 66. i

At the lower end of the frame 66 a air of dependin legs 85 are to be found w ich are provide with tenons 86 adapted to "engage corresponding grooves 87 in a. supporting plate 88 for ear trains (see Figures 6 and 7 The plate is reversible in the frame and becomes flush with the front and rear faces of the frame in either position. A clamping screw 89 is furnished on each of the legs85 but only one nut 90 is provided for both. This nut' is adapted to engage one of the counter bores 91 in the plate when drawn up tight in this manner securing the parts together. It will be observed that the screw 89 on the right hand side of Figure 3 is placed slightly higher up than on the left side. Consequently, when the nut is shifted from said screw to that on the left, a slight displacement will take place downwardly of the supporting plate. 11 this manner the intermediary gears on the plate may be adjusted with relation to the ring gear 75.

The intermediary gearsare mounted on studs 95 and 196 on the supporting plate, the inner pair 96 of these gears form connection between the hour gear 58 in the clock work and the ring pinion 75 while the outer pair 97 form connection between the minute gear 59 and the ring pinion 99-Figure 13. Accordingly, as the gears 58 and 59 run clockwise, the ring gears 75 and 99 with their hour and minute hands will also run clockwise. To reverse this motion the intermediary gears 100 and 101 are placed'in mesh -with the hour and minute ring gears 75 and 99, respectively, b reversing the supporting plate 88 in the ame 66. Theaddeddiameters of gears 96 or 97 are equal to that of 100 or 101. I

In the Figures 8, 9 and 10 is illustrated the carrier plate 105 for the minute ring gear 99 and its crystal 106. The plate 105 is mounted in the grooves 72 of the frame 66 and adapted to slide up or down therein by turning the adjustment screw 107 which is threaded in the small bracket'108 on the plate 105. The head 109 of the screw engages for this pur ose in a lateral slot 110 In one of the ribs 0 of the frame 66.

The carrier plate 105=-has a central, circular opening 111 and below the same is mounted a guide 114 Figures 11 and 12 in guide blocks 112 and 113 so-as to be transversely adjustable on the rear face of the plate 105. The adjustment is made by means of a set screw 115 journaled in a bracket 116 secured on the guide .114 and threaded in the bracket 113. Studs 117 fixed in the guide project through slots 118 in the carrier plate 105 to the front thereof and carry revolubly on their ends rollers 119. A single roller 120 is similarly mounted on the front side of the plate so as to be in the same vertical plane as the rollers 119. With the guide 114 in central position all three rollers are at the same radial distance from the center of the openin 111 and equally spaced circumferentia lly.

An annular groove 121 in the ring gear 99 (see Figs. 10 and 13) engages the rollers to permit free rotation of the ring ear. The crystal 106 with the minute han 122 marked thereon is secured in the ring gear 99. It will now be evident that by means of the two set screws'109 and 115 the minute hand is adjustable in all directions in its vertical plane.

In the grooves 71 of the frame 66 the dial supporting plate 125 is slidably carried. It has downwardly extending arms 126 suitably grooved as at 127 to receive the transparent clock dial 128, Figs. 16 and 17. The arms are partly slit longitudinally to produce spring fingers 129 for keepingthe dial from rattling, and a springclip 130 1s adaptcd to hold the dial in position. At the upper end of the supporting plate 125 is provided a rib 131 with parallel side faces adapted to fit slidably between the bars 84 on the slide 79. A forwardly projecting lug 132 on the rib carries a set screw 133 journaled therein and the lower end of the screw engages in a threaded socket 134 furnished in the bars 84 of the slide 79.

It will now be evident that adjustment of the clock dial can be made in all directions of its vertical plane by means of the set screws 133 and 81.

The clock dial 128 preferably an ordinary photographic plate or crystal has marked on it in black or colors the usual hour numerals 135 and in conjunction therewith or in place thereof any suitable advertising matter which may be arranged inside or outside the circle of hour characters. Different examples of the marking of thedials are shown in Figs. 16 and 18 but it is evident that many other variations may be usedaccording to the requirement of the advertiser using the clock. Such varlations are illustrated in Figures 21 to 24 inclusive. These show artistically executed dials, and Figure 23 for instance is intended for day pictures while Fi re 24 is intended for night pictures. T e dials are preferabl the size and quality of standard lantern sli es. It is evident that similar pictures may also be provided on the hour and minute hand crystals.

In Figs. 19 and 20 is shown a heat'distributing screen 136 which may be placed in a holder in front of the condenser chamber 40 inorder to intercept. the heat, rays emanating therefrom and carry them 0 in order to keep the dial and hand crystals as cool as possible. The light rays are permitted to proceed through the central opening 137 in the screen to the dial 128, this opening having preferably the same shape as the contour of the marking on the dial,- that is it may be round, rectangular, or any other shape as required. As indicated the screen may be ribbed or corrugated as at 138 to facilitate the carrying off of the heat and if found necessary a second screen may be placed back of the hollow cone 60 in the guides of the carrier 55. In conjunctionv with these screens or singly other similar screens may be placed between and in rear of the condensers as well asin front thereof.

The apparatus may be constructed 'of metal, with exception of lenses, crystals and dial but some parts may be made ofheat resisting material such as asbestos board or papier-mach. Parts that mayadvantageously be made of such material are the dial supporting plate 125 and the ring pinion carrier plate 105.

When using the apparatus it is placed on a pedestal or table with the telescope in the direction of a screen or wall. able frame 66 with all parts assembled therein is next inserted in the carrier 55 and secured by the latch 68. With the light switched on the position of the carrier is next adjusted by pushing it along the rails 35 and secured by set screw 57 in correct position between the screen and the condensers 42 and similarly the lenses 50 are advanced or retracted by turning the tube 51 until a sharp image of the clock dial is projected on the screen.

According to whether the image is thrown against a screen or through the same the clock dial 128 has been inserted reversed or direct in its supporting plate 125; similarly the gear supporting plate 88 has been inserted in the frame 66 so that the suitable gears 96, 97 or 100, 101 mesh with the respective ring pinions 75 and 99 so as to turn the hands clockwise or anti-clockwise as required. It is evident that the reversal of the images may also be accomplished by reversing the position of the entire carrier 55 on its guide rails As the hour hand ring pinion 75 is nonadjustably carried in the The detachframe 66, the gears on the late 88 are adjusted relatively thereto by t 1e nut 90. This is done before the frame 66 is inserted in the carrier 55.

The frame 66 is now vertically adjusted in the carrier by means of the screw 67 to give proper engagement between the intermediary gears and the gear wheels 58 and 59 of the clock work 56.

Next, the ring gears 75 and 99 with their hour and minute hands and the dial plate 125 are adjusted until their. centers fall in the focal axis of the condenser 42 and the lenses 50. This adjustment is accomplished by means of'the four set screws 81, 133, 115 and 107.

Lastly, the focal axis may be ad usted to meet'the screen perpendicularly by setting the front legs 33 at a suitable angle against the base 31 and secure them by set screw 37 It is to be understood that the invention as here disclosed is not limited to the details of construction shown and described and that these may be varied widely without departing from the spirit of the invention as defined by the claims.

I claim:

.1. In a shadow projecting apparatus the combination with a source of light anda mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate ad ustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate ad ustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, and driving connection between said mechanical drive and thering pinions, substantially as set forth. '2. In a'shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjust ably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring p1n1on by engaging 1n the groove'thereof, a'supporting .plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate ad ustably;

mounted in said frame, shadow effecting elements in said ring pinions and second sup-' porting plate respectively and gear trains inserted between said mec anical' drive and slid ring pinions adapted to selectively turn said ring pinions in clock-wise or anti-clockwise direction respectively, substantially as set forth.

3. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion,

rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring the ring pinions, substantially as set forth.

4. In a shadow projecting apparatus, the combination with a source of lightand a mechanical drive; of a carrier for the mechanical. drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the sup porting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate adjustably mounted in said frame, shadow eflecting elements in said ring pinions and second supporting plate respectively, said shadow efecting elements for, the gear rings showing hour and minute hands respectively, and the shadow effecting elements for the second supporting plate showing a clock dial with letters representing-the hours, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.- p

5. In a shadow projecting apparatus, the combination with a source oflight and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjust-v ably mounted in the carrier with relation to the mechanical drive, a grooved ring inion, rollers mounted on the frame free y suspending the ring pinion by engaging in the groove thereof, a supporting plate adjust in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, said shadow effecting elements for the gear rings showing hour and minute hands respectively, and the shadow effecting elements for the second supporting plate showing a clock dial with advertising matter, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

6. In a shadow projecting apparatus, the eondnnation with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate ad3ustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate adjustably mounted in said frame, and shadow effecting elements in said ring pinions and second supporting plate respectively, said shadow effecting elements for the gear rings showi ng hour and minute hands respectively, and the shadow effecting elements for the second supporting plate showing a clock dial with advertising matter in colors, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

7. In ashadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a rooved ring pinion, rollers mounted on t e frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, gear trains inserted between said mechanical drive and said ring pinions adapted to selectively turn said ring pinions in clockwise or anti-clockwise direction, respectively, said shadow effecting elements for the gear rings showing hour and minute hands respectively and the shadow effecting elements for the second supporting plate showing a clockdial, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

8. In a shadow projecting apparatus the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive. a detachable frame adiustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely susii-ending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, a slide adjustably mounted on the supporting plate, rollers on the slide and the supporting plate respectively freely suspending the second ring pinion by engaging in the groove thereof, a second supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

9. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear b engaging in the groove thereof, a seconc supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, said shadow effecting elements for the gear rings showing hour and minute hands respectively, and the shadow effecting elements for the second supporting plate showing a clock dial, and driving connection between said mechanical drive and the ring pinions, said second supporting plate being provided with a spring clip for removably retaining the shadow effecting element in position, substantially as set forth.

10. In a shadow projecting apparatus, the combination with a source of light and a. mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging in the groove thereof, a second supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate respectively, said shadow effecting ele ments for the gear rings showing hour and minute hands respectively and the and a condenser therefor in the chamber,

lenses in the stand in alinement with the condenser, a'carrierslidably mounted on the rails intermediary the condenser and the lenses, a clock work suspended from the carrier and having hour and minute spindles, gears on said spindles, a detachable frame adjustabl mounted in the carrier with relation to e spindles, a retaining catch between the carrier and the frame, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pimon by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, a slide adjustably mounted on the supporting plate, rollers on the slide and on the supporting plate respectively freely suspending the second gear pinion by engaging in the groove thereof, a second supporting plate adjustably mounted in the frame, a transparent clock dial, a spring clip on the second supporting plate adapted to removably secure the dial therein, crystals in said ring pinions having marked thereon hourand minute hands respectively, gear trains inserted between the ring pinions and said hour and minute gears ada ted to selectively turn the ring plnions in ockwise or anti-clockwise direction, and means for adjusting the position of the gear trains with relation to the ring pinions, substantially as set forth.

12. In .a shadow projecting apparatus a stand having longitudinal rails, hinged legs on the ,rails, permitting adjustment of the stand in a vertical plane, a chamber, a light and a condenser therefor in the chamber, lenses on the stand in alinement with the condenser, a carrier slidably mounted on the rails intermediary the condenser and the lenses, a clock work suspended from the carrier and having hour and minute spindles, gears on said spindles, a detachable frame adjustabl mounted in the carrier with relation to t e spindles, a retaining catch between the carrier and the frame, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engag ing in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, a slide adjustably mounted on the supporting plate, rollers on the slide and on the supporting plate re spectively freely suspending the second gear pinion by engaging in the groove thereof, a second supporting plate adjustabl mounted in the frame, a transparent cloc dial with letters representing hours and advertising matter in colors marked thereon,

a spring clip on the second supporting late adapted to removably secure the dial t erein, crystals in said ring inions having marked thereon hour and minute hands respectively, gear trains inserted between the ring pinions and said hour and minute gears ada tedto selectively turn the ring pinions in c ockwise or anti-clockwise direction, and means for adjusting the position of the gear trains with relation to the ring pinions, substantially as set forth.

13. In a shadow projecting apparatus a stand having longitudinal rails, hinged legs on the rails permitting adjustment of the stand in a vertical lane, a chamber, a light and a condenser tlierefor in the chamber, lenses on the stand in alinement with the condenser, a carrier slidably mounted on the rails intermediary the condenser and the lenses, a clock work suspended from the carrier and having hour and minute spindles, gears on said spindles a detachable frame adj ustablymounted in the carrier with relation to the spindles, a retaining catch between the carrier and the frame, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted inthe frame, a second grooved ring pinion, a slide adjustably mounted on the supporting plate, rollers on the slide and on the supporting plate respectively freely suspending the second gear pinion by engaging in the groove thereof, a second supporting plate adjustably mounted in the frame, a transparent clock dial, with letters representin hours and advertisement matter in co ors marked thereon, a spring cli on the second supporting plate adapte to removably secure the dial therein, crystals in said rin pinions having marked thereon hour an minute hands respectively, gear trains inserted between the ring pinions and said hour and minute gears adapted to selectively turn the ring pinions in clockwise or anti-clockwise direction, and means for adjusting the position of the gear trains with relation to the ring pinions; said vcarrier being reversible on the rails, substantially as set forth.'

14. In a shadow pro ecting apparatus a stand having longitudinal rails, hinged legs on the rails permitting adjustment of the stand in a vertical plane, a chamber, a light and a condenser therefor inv the chamber, lenses on the stand in alinement with the condenser, a carrier slidably'mounted on the rails intermediary the condenser and the lenses, a clock Work suspended from the carrier and having hour andminute spindles, gears on said spindles, a detachable frame adjustably mounted in the carrier with relation to the spindles, a retaining catch between the carrier and the frame, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, a slide adjustably mounted on the supporting plate, rollers on the slide and on t e supporting plate respectively freely suspending the second gear pinion by engaging in the groove thereof, a second supporting plate adjustably mounted in the frame, a transparent clock dial with letters representing hours and advertising matter in colors marked thereon, a spring clip on the second supporting plate adapted to removably secure the dial therein, crystals in said ring pinions having marked thereon hour and minute hands respectively, gear trains inserted be tween the ring pinions and said hour and minute gears adapted to selectively turn the ring pinions in clockwise or anti-clockwise direction, means for adjusting the position of the gear trains with relation to the ring pinions; said detachable frame together with the ring pinions, the gear trains, the supporting plates, the slide, the rollers, the dial and the crystals forming a unitremovable from the carrier.

15. In a shadow projecting apparatus the combination with a source of light and a mechanical drive; of a carrier for the mechanical drive, a detachable frame adjustably mounted in the carrier with relation to the mechanical drive, a grooved ring pinion, rollers mounted on the frame freely suspending the ring pinion by engaging in the groove thereof, a supporting plate adjustably mounted in the frame, a second grooved ring pinion, rollers mounted on the supporting plate freely suspending the second ring gear by engaging 1n the groove thereof, a second supporting Iplate ad'ust ably mounted in said frame, s adow e ecting elements in said ring pinions and second supporting late respectively, and driving connection getween said mechanical drive and the ring pinions, said shadow effecting elements including a clock dial, hour and minute hands and artistic pictures or the equivalent, substantially as set forth.

16. In a shadow pro ecting apparatus the combination with a source of light and a mechanical drive; of a carrier for said drive, a frame mounted in the carrier, a ring pinion, rollers mounted on the frame freely suspending the ring pinion, a supporting plate mounted in the frame, a second ring pinion, rollers mounted on the supporting plate freely suspending the second ring pinion, a

second supporting plate mounted in said frame, shadow effecting elements in said ring' pinions and second supporting plate respectively, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

17. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for said drive, a frame adjustably mounted in the carrier, a ring pinion, rollers mounted on the frame freely suspending the ring pinion, a supporting plate -adjustably mounted in the frame, a second ring pinion, rollers mounted on the supporting plate freely suspending the second ring pinion, a second supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate, respectively, and driving connection between said mechanical drive and the ring pinions, substantially as set forth.

18. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for said drive, a frame adjustably mounted in the carrier, a ring pinion, rollers mounted on th frame freely suspendin the ring pinion, a supporting plate a justably mounted in the frame, a second ring inion, rollers mounted on the supporting p ate freely suspending the second ring pinion, a second supporting plate adjustably mounted in said frame, shadow effecting elements in said ring pinions and second supporting plate, respectively, and driving connection between said mechanical drive and the rin pinions comprising gear trains inserte between said mechanical drive and the ring pinions adapted to selectively turn the ring pinions in elther of two directions, and a reversible plate carrying said gear trains in order to permit such selection, substantially as set forth.

19. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for said drive, a frame adjustably mounted in the carrier, :1 ring pinion, rollers mounted on the frame freely suspending the ring pinion, a suporting plate adjustably mounted in the rame, a second ring inion, rollers mounted on the supporting p ate freely suspending the second ring pinion, a second supporting 'plate adjustably mounted in said frame,

shadow effecting elements in said ring pinions and second supporting plate, respectively, and driving connection between said mechanical drive and the ring pinions comprising gear trains inserted between said mechanical drive and the ring pinions adapted to selectively turn the ring pinions in either of two directions, and a reversible plate carrying said gear trains in order to permit such selection, said shadow effecting elements including a clock dial, hour and minute hands and artistic pictures or the equivalent, substantially as set forth.

20. In a shadow projecting apparatus, the combination with a source of light and a mechanical drive; of a carrier for said drive, a frame mounted in the carrier, supporting plates mounted in the frame, ring pinions,

smooth faced rollers mounted on the frame and one of the supporting plates respectively adapted to freely suspend the ring pinions, shadow effecting elements in said ring pinions a-nd in the other of the supporting plates respectively and reversible driving connection between said mechanical drive and the ring pinions, and means for adjusting the frame in the carrier and the supporting plates in the frame substantially as set forth.

In Witness whereof, I have hereunto set my hand at \Vashington, D. 0., this twentyninth day of October, A. D. nineteen hundred and twenty-six.

ALVIN R. MEISSNER. 

